After spending 6000 credit cards, there is still more than 1800 left. The use of credit cards needs to be planned reasonably according to their actual situation to avoid excessive consumption and financial pressure. The remaining credit card limit should be controlled above 30%, which can avoid problems such as overrun and overdue. Therefore, your credit card limit is 6,000 yuan, and it is best to control the remaining money after swiping the card at 1800 yuan, so as to ensure that you have enough balance to meet other emergency expenses or avoid being charged high interest. Of course, the specific remaining amount should be reasonably planned according to your actual situation to avoid financial pressure and overdue credit cards.